Thyroxine, secreted by the thyroid gland, primarily regulates:
A. Blood calcium levels
B. Blood sugar levels
C. Basal metabolic rate (BMR)
D. Water balance in the body
Answer: Option C
Solution (By JKSSB Mock Tests)
Thyroxine (T4) and Triiodothyronine (T3) are the main hormones secreted by the thyroid gland. They play a crucial role in regulating the basal metabolic rate (BMR), which is the rate at which the body uses energy at rest. They also influence growth, development, and body temperature. Calcitonin, also from the thyroid, regulates blood calcium.
Explanation:
Trypsin is a pancreatic protease. Ptyalin is an amylase, pepsinogen requires HCl for activation, sucrase acts on sucrose, lactase on lactose.
Explanation:
A synapse is a specialized junction where the axon terminal of one neuron communicates with the dendrite or cell body of another neuron via neurotransmitters. The axon hillock is where action potential initiates, nodes of Ranvier are gaps in myelin sheath, dendrites receive signals.
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