Questions Related to biology

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Hypothalamus does not control

  1. Hunger and satiety

  2. Thermoregulation

  3. Libido

  4. Creative thinking and consciousness

  5. Osmoregulation

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The hypothalamus regulates autonomic and endocrine functions like hunger, temperature, and osmoregulation. Higher cognitive functions like creative thinking and consciousness are primarily associated with the cerebral cortex.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Which of the following statements about 'neuro-hypophysis' is correct?

  1. It stores the hormones produced by adenohypophysis

  2. It is poorly developed and functionless in humans

  3. It stores and releases hormones secreted by hypothalamus

  4. It secretes its own hormones

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Neurohypophysis or the posterior lobe of pituitary gland consists of axonal endings of neurosecretory neurons located in hypothalamus. Oxytocin and vasopressin are the hormones secreted by hypothalamus but stored and released by neurohypophysis.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

A man is suffering from abnormally low body temperature, loss of appetite and extreme thirst. His brain scan is liable to show tumour in

  1. Pons

  2. Cerebellum

  3. Medulla oblongata

  4. Hypothalamus

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Symptoms like abnormal body temperature, loss of appetite, and extreme thirst point to dysfunction in the hypothalamus, which regulates these homeostatic processes.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Hypothalamus is not involved in

  1. Osmoregulation and thirst

  2. Temperature control

  3. Accuracy of muscular movement

  4. Sleep wake cycle

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The hypothalamus controls autonomic functions like temperature and thirst, but the cerebellum is responsible for the accuracy and coordination of muscular movement.

Multiple choice biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Pituicytes are under the control of ____________.

  1. Adenohypophysis

  2. Hypothalamus

  3. Neurohypophysis

  4. Both (a) and (c)

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pituicytes are the cells found in the posterior lobe of pituitary gland. The hormones, oxytocin and vasopressin released by pituicytes are actually produced by hypothalamus.