Test Biology Grade XI

1.Which statement about nutrient absorption by the intestinal mucosal cells is true?
a.Carbohydrates are absorbed as disaccharides.
b.Fats are absorbed as fatty acids and monoglycerides.
c.Amino acids move across the plasma membrane only by diffusion.
d.Bile transports fats across the plasma membrane.
e.Most nutrients are absorbed in the duodenum.

2.Microbial fermentation in the gut of a cow_____
a.produces fatty acids as a major nutrient for the cow.
b.occurs in specialized regions of the small intestine.
c.occurs in the cecum, from which food is regurgitated, chewed again, and swallowed into the true stomach.
d.produces methane as a major nutrient.
e.is possible because the stomach wall does not secrete hydrochloric acid.

3.Constipation can happen because_____
a.Infection of colon wall
b.Hurt at ventricle layer of mucus
c.Too many gastric juice produced
d.Too much water is absorbed by colon wall
e.Infection of colon wall by coli bacteria

4.These are organs that have a role in the food digestion processes :
1. pharynx 5. stomach
2. larynx 6. pancreas
3. esophagus 7. liver
4. trachea 8. duodenum
The organs that include a human digestive tract are_____
a.1,4,5, and 6
b.1,4,5, and 8
c.1,2,3, and 5
d.1,3,5, and 8
e.2,4,5, and 8

5.Structure sequence chambers of stomach herbivore animal is_____
a.rumen – reticulum – omasum – abomasum
b.rumen – reticulum – abomasum – omasum
c.reticulum – rumen – omasum – abomasum
d.reticulum – rumen – omasum – abomasum
e.omasum – abomasum – reticulum – rumen

6.Two kinds of enzyme which break down disacarida in the intestine are_____
a.Amylase and lipase
b.amylase and lactase
c.Maltase and amylase
d.sucrase and maltase
e.Sucrase and amylase

7.Fiber is very important in the human digestion because_____
a.Fiber can support to produce feces in colon
b.Fiber accelerates the digestion
c.Push the left digestion to rectum
d.Collect the nutrient
e.Filter the digestive food

8.If there is an indication of poisoned in the body, the main organ which has to be responsible to neutralize it is______
e.Endocrine gland

9.The primary functions of the respiratory system is (are)_______
a.To provide an area for gas exchange between air and circulating blood
b.To protect respiratory surfaces dehydration and environmental variations
c.To move air to and from the exchange surface
d.All of the above
e.None of the above

10.Write the correct sequence of the pathway through which air travels after entering the body_____.
a.Larynx, pharynx, trachea bronchioles
b.Pharynx, larynx, trachea, bronchioles
c.Pharynx, larynx, bronchioles, trachea
d.Pharynx, trachea, larynx, bronchioles
e.Larynx, trachea, pharynx, bronchioles

11.The volume of air that can be exhaled after normal exhaltation is the _______
a.Tidal volume
b.Residual volume
c.Inspiratory reserve volume
d.Expiratory reserve volume
e.Total volume

12.The primary chemical stimulus for breathing is the concentration of _____
a.Carbon monoxide in the blood
b.Carbon dioxide in the blood
c.Oxygen in the blood
d.Carbonic acid in the blood
e.Oxyhemoglobin in the blood

13.After passing through the trachea, the correct pathway a molecule of inspired air would take to reach an alveolus is_____
a.primary bronchus –> secondary bronchus –> bronchioles –> respiratory bronchioles –> terminal bronchioles –> alveolus
b.primary bronchus –> bronchioles –> terminal bronchioles –> respiratory bronchioles –> alveolus
c.bronchi –> secondary bronchus –> bronchioles –> terminal bronchioles –> alveolus
d.primary bronchus –> secondary bronchus –> bronchioles –> terminal bronchioles –> respiratory bronchioles –> alveolus
e.none of the above

14.Asfiction is the disturbance in respiratory system is caused by______
a.The swelling of lymphatic gland
b.The swelling of lymphatic gland in throat
c.The inflammation of artery above nasal cavity
d.Hardly taking breath because of tremor in trachea
e.The disturbance of O2 transportation to the tissue

15.Air sacs when bird is flying has function for_______
a.Protecting body from cold
b.Preventing discharge of body heat
c.Lightening body
d.Hardening voice
e.Helping the respiratory process

16.The right connection between organism and the excretory organs are_____
a.Planaria – green cell
b.worm – flame cell
c.fish – nefridia
d.Turbinaria – nefridia
e.grasshopper – Malphigi

17.When you focus your eyes on a nearby object, the lenses
a.decrease in diameter. .
b.move forward.
c.become more rounded.
d.become flatter
e.move backward

18.Eating carrots is good for your eyes. Carrots contain vitamin A, which is used to make a substance called retinal, which
a.is a visual pigment that absorbs light.
b.provides energy for the function of rods and cones.
c.colors the iris of the eye.
d.stimulates the neurons in the retina to form branches and connections.
e.keeps the lens clear and transparent.

19.Which of the following is part of the central nervous system (CNS)?
a.cranial nerve
b.spinal nerve
c.spinal cord.
d.sympathetic nerve

20.What is the difference between a neuron and a nerve?
a.One is sensory in function, the other motor.
b.Nerves are found only in the central nervous system.
c.They consist of different numbers of cells.
d.Neurons are made of white matter, nerves of gray matter.
e.Neurons are found only in vertebrates.

21.Alex became so dehydrated while playing tennis that his blood pressure started to drop. His ______ detected the pressure drop and sent signals via _____ to speed up the heart, compensating for the drop in pressure.
a.hypothalamus…… . .. parasympathetic neurons
b.medulla oblongata . . . sympathetic neurons
c.cerebellum . . ………. sympathetic neurons
d.medulla oblongata . . . parasympathetic neurons
e.cerebellum . ………. . parasympathetic neurons

22.Sensory receptors in the ear can detect a whisper or a shout and can transmit nerve signals about these sounds to the brain. How would sensory neurons relay information to the brain about the relative loudness of sounds?
a.The action potentials would travel at different speeds.
b.The size of action potentials would vary.
c.The number of action potentials would vary.
d.The frequency of action potentials would vary.
e.Action potentials would be routed to different parts of the brain.

23.Which of the following correctly traces the path of sperm from their site of production to exiting a man’s body?
a.seminiferous tubule – vas deferens – epididymis – urethra
b.epididymis – urethra – seminiferous tubule – vas deferens
c.seminiferous tubule – epididymis – vas deferens – urethra
d.epididymis – seminiferous tubule – vas deferens – urethra
e.vas deferens – epididymis – urethra – seminiferous tubule

24.External fertilization occurs mostly in
a.land animals. .
b.insects. .
c.aquatic animals.
d.animals that reproduce asexually

25.After ovulation occurs, the empty follicle
a.can be recycled to produce more eggs.
b.changes into the corpus luteum and makes hormones.
c.quickly degenerates.
d.immediately initiates menstruation.
e.becomes the site of implantation of a fertilized egg.

26.Which of the following most reduces the chances of both conception and the spread of sexually transmitted diseases?
b.birth control pill
d.intrauterine device

27.Pregnancy tests detect a hormone in a woman’s urine that is present only when an embryo is developing in her uterus. This hormone is secreted by
a.the ovary.
b.the embryo.
c.a follicle
d.the pituitary.
e.the endometrium.

28.A vasectomy is an effective technique for birth control in males because it
a.reduces the alkaline secretions in the semen and the sperm are destroyed in the female reproductive tract.
b.causes the prostate gland to enlarge and seal off the ejaculatory duct.
c.severs the capillaries to the spermatozoa, which then die.
d.severs the capillaries of the testes and prevents the arrival of pituitary hormone.
e.severs the route used by the sperm to exit the male’s body.

29.A sperm has several components; the function of the acrosome is to
a.produce base to neutralize the acidic environment of the female reproductive system.
b.metabolize the sugars provided for energy by the semen.
c.release an enzyme that breaks down the membrane of the ovum.
d.propel the sperm as they swim through the fluid of the female reproductive tract.
e.chemically identify the proper oviduct.

30.very time you eat a cookie or candy bar, your blood sugar increases. This triggers an increase in the hormone
c.adrenocorticotropic hormone (ACTH).


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