This set of Human Anatomy online test focuses on “Thymus, Pineal Body, Chromophil and Cortical Systems”.
1. The Thymus is located in __________
b) Along intestinal walls
c) Along trachea
d) In abdominal cavity above diaphragm
Explanation: The Thymus is located along the trachea behind the sternum. It is located between lungs.
2. Thymus secrets ____
Explanation: Thymus secrets Thymosin. It stimulates the development of disease fighting Tcells.
3. Thymus is smaller in children than in adults
Explanation: After puberty thymus starts to slowly shrink. It becomes replaced by fat.
4. T lymphocytes mature in ____
c) Red bone marrow
Explanation: T lymphocytes play a central role in cell mediated immunity, it has a receptor on the cell surface. T lymphocytes mature in Thymus.
5. Endocrine gland thought to be involved in setting the biological clock and influencing the reproductive function of ___________
a) Pituitary gland
b) Thymus gland
c) Adrenal gland
d) Pineal gland
Explanation: Pineal gland is the small endocrine gland. It secrets the hormone that affects the modulation of sleep/wake patterns and photoperiodic functions.
6. Pineal gland of human brain secretes melatonin concerned with ________
b) Body temperature
d) Coloration of the skin
Explanation: Melatonin is a hormone secreted by Pineal gland. It is also known as N-acetyl-5-methoxy tryptamine.
7. The pineal gland secrets _____________
Explanation: The pineal gland secrets Melatonin. It regulates sleep and wakefulness. Melatonin supplement is used to treat jet lags or sleep problems.
8. Where is Pineal gland located?
a) Just below Adam’s apple
b) Hanging down from hypothalamus
c) Between the right and left hemisphere of the brain
d) In the frontal lobe of brain
Explanation: Pineal gland is located in the epithalamus near the centre of the brain between the two hemisphere tucked in a groove where the two halves of the thalamus join. The function of this gland was discovered last.
9. Changes in blood concentration of glucose, oxygen and hydrogen ions are detected by __________
Explanation: Chemoreceptors are stimulated by a change in concentration of chemicals such as glucose, oxygen, carbon dioxide and hydrogen ions.
10. Which of these receptors detects stretching or lengthening of a muscle?
b) Muscle spindle
c) Golgi tendon organ
d) Meissner’s coruscle
Explanation: Muscle spindle and Golgi tendon organs both transmit proprioceptive information. The muscle spindles are located within muscles while Golgi tendon organs are located within the tendons.
11. The sensation of temperature, touch, pressure and pain occurs in ___________
a) Temporal lobe
b) Occipital lobe
c) Parietal lobe
d) Frontal lobe
Explanation: The sensation of temperature, touch, pressure and pain occur in postcentral gyrus of each parietal lobe. The Parietal lobe contains primary somatic sensory cortex. The thalamus projects general somatic sensory information to this part of the cerebrum.
12. The occipital lobe contains which of the following primary sensory areas?
Explanation: The cerebrum is divided into lobes. The visual cortex where the visual images are processed is located in occipital lobe.
13. Which of the following is an effect of aging on the nervous system?
a) Reduction in the number of free nerve ending
b) Decreased awareness of tactile stimulation
c) Identify objects by touch more easily
d) An increases sense of two pint discrimination
Explanation: As one age, free nerve endings and hair follicle receptors largely remain unchanged, however pacinian corpuscles and Meissner’s corpuscles decrease in number and become structurally distorted, thus elderly have a decreased awareness of tactile and pressure stimulation.
Sanfoundry Global Education & Learning Series – Human Anatomy and Physiology.
To practice all areas of Human Anatomy for online tests, here is complete set of 1000+ Multiple Choice Questions and Answers.