Multiple Choice QuestionsThe human hind brain comprises three parts, one of which is
spinal cord
corpus callosum
Cerebellum
Cerebellum
Which part of the human ear plays no role in hearing as such but is otherwise very much required?
Eustachian tube
Organ of corti
Vestibular apparatus
Vestibular apparatus
How do parasympathetic neural signals affect the working of the heart?
Reduce both heart rate and cardiac output
heart rate is increased without affecting the cardiac output
Both heart rate and cardiac output increase
Both heart rate and cardiac output increase
Injury localised to the hypothalamus would most likely disrupt
short term memory
coordination during locomotion
executive function, such as decision making
executive function, such as decision making
Which one of the following statements is not correct?
Retinal is the light absorbing portion of visual photopigments
In retina, the rods have the photopigments rhodopsin, while cones have three different photopigments
Retinal is a derivative of vitamin -C
Retinal is a derivative of vitamin -C
The supportive skeletal structures in the human external ears and in the nose tip are examples of
ligament
areolar tissue
bone
bone
Which of the following regions of the brain is incorrectly paired with its function?
Medulla oblongata – homeostatic control
Cerebellum – language comprehension
Corpus callosum – communication between the left and right cerebral cortices
Corpus callosum – communication between the left and right cerebral cortices
A gymnast is able to balance his body upside down ever in the total darkness because of
cochlea
vestibular apparatus
tectorial membrane
tectorial membrane
The purplish red pigment rhodopsin contained in the rods type of photoreceptor cells of the human eyes is a derivative of
Vitamin -C
Vitamin -D
Vitamin - A
Vitamin - A
|
Gland |
Secretion |
Effect on Body |
|
A |
Oestrogen |
Maintenance of secondary sexual characters |
|
Alpha cells of islets of Langerhans |
B |
Raise blood sugar level |
|
Anterior pi- tuitary |
C |
Over secretion leads to gigantism |
|
A |
B |
C |
|
Placenta |
Insulin |
Vasopressin |
|
A |
B |
C |
|
Ovary |
Insulin | Calcitonin |
|
A |
B |
C |
|
Placenta |
Glucagon |
Calcitonin |
|
A |
B |
C |
|
Placenta |
Glucagon |
Calcitonin |
D.
|
A |
B |
C |
|
Placenta |
Glucagon |
Calcitonin |
The ovary is the primary female sex organ that produces the female gamete (ovum) and several steroid hormones (ovarian hormones). The two steroid hormones produced by ovary are oestrogen and progesterone. Oestrogens produced by ovary are oestrogen and progesterone. Oestrogens produce wide-ranging actions such as stimulation of growth and activities of females secondary sex organs, development of growing ovarian follicles, appearance of female secondary sex characters (e.g., high pitch of voice, etc.) mammary gland development oestrogens also regulate female sexual behaviour.
Alpha cells of islets of Langerhans of the endocrine pancreas secrete a hormone called glucagon. It is a peptide hormone and plays an important role in maintaining the normal blood glucose levels. It acts mainly on the liver cells (hepatocytes) and stimulates glycogenolysis resulting in an increased blood sugar (hyperglycemia). In addition, this hormone stimulates the process of gluconeogenesis which reduces the cellular glucose uptake and utilisation. Thus, glucagon is a hyperglycemic hormone.
The pars distalis region of pituitary commonly called produced anterior pituitary, Growth Hormone (GH), prolactin (PRL), Thyroid-stimulating Hormone (TSH) Adrenocorticotrophic Hormone (ACTH), Luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Over secretion of GH stimulates the abnormal growth of the body leading to gigantism and low secretion of GH results in stunted growth resulting in pituitary dwarfism.
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