10+ MCQ on Control and Co-ordination
Here are 10+ MCQ on Control and Co-ordination questions along with answers and explanations related to the nervous system and coordination in humans:
1. Which part of the brain controls blood pressure?
A. Medulla oblongata
B. Hypothalamus
C. Cerebellum
D. Cerebrum
Answer: A. Medulla oblongata
Explanation: The medulla oblongata, located in the brainstem, controls vital functions such as blood pressure, heart rate, and breathing.
2. What is the function of the pituitary gland?
A. Regulation of body temperature
B. Production of insulin
C. Secretion of growth hormones
D. Regulation of muscle contraction
Answer: C. Secretion of growth hormones
Explanation: The pituitary gland, often called the master gland, secretes various hormones that regulate growth, metabolism, reproduction, and other functions.
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3. Which of the following options shows the order of events correctly when a bright light is focused on our eyes?
A. Pupil constricts, iris relaxes, retina sends signals to brain
B. Pupil dilates, iris constricts, retina detects light
C. Pupil constricts, iris constricts, retina detects light
D. Pupil dilates, iris relaxes, retina sends signals to brain
Answer: C. Pupil constricts, iris constricts, retina detects light
Explanation: When a bright light is focused on the eyes, the pupil constricts to reduce the amount of light entering the eye, the iris constricts to reduce the size of the pupil, and the retina detects the light and sends signals to the brain.
4. Any change in the environment to which an organism responds is called:
A. Stimulus
B. Response
C. Reflex
D. Homeostasis
Answer: A. Stimulus
Explanation: A stimulus is any change in the environment that triggers a response in an organism.
5. The hormone responsible for the regulation of blood glucose levels is:
A. Insulin
B. Glucagon
C. Estrogen
D. Testosterone
Answer: A. Insulin
Explanation: Insulin, produced by the pancreas, lowers blood glucose levels by promoting the uptake of glucose into cells.
6. Electrical impulse travels in a neuron from:
A. Dendrites to cell body to axon
B. Axon to cell body to dendrites
C. Axon to dendrites to cell body
D. Cell body to axon to dendrites
Answer: A. Dendrites to cell body to axon
Explanation: In a neuron, an electrical impulse (action potential) travels from the dendrites to the cell body (soma) and then down the axon to transmit signals to other neurons or effector cells.
7. Which of the following is the control and coordination center in humans?
A. Pancreas
B. Liver
C. Brain
D. Stomach
Answer: C. Brain
Explanation: The brain is the central control and coordination center in humans, responsible for processing sensory information, regulating body functions, and coordinating responses.
8. Which of the following is NOT a type of neuron?
A. Sensory neuron
B. Motor neuron
C. Relay neuron
D. Epithelial neuron
Answer: D. Epithelial neuron
Explanation: Epithelial cells are not neurons; they are a type of cell that lines surfaces and cavities in the body.
9. The chemical messengers released by endocrine glands are called:
A. Neurons
B. Neurotransmitters
C. Hormones
D. Enzymes
Answer: C. Hormones
Explanation: Hormones are chemical messengers released by endocrine glands into the bloodstream to regulate various body functions.
10. Which of the following is responsible for the regulation of heart rate and breathing in humans?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus
Answer: C. Medulla oblongata
Explanation: The medulla oblongata, part of the brainstem, regulates essential functions such as heart rate, breathing, and blood pressure.
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11. Which of the following is NOT a reflex action?
A. Blinking when something approaches the eye
B. Pulling your hand away from a hot object
C. Digesting food in the stomach
D. Sneezing in response to irritants in the nose
Answer: C. Digesting food in the stomach
Explanation: Digestion is not considered a reflex action; it involves complex processes controlled by the digestive system. Reflex actions are rapid and involuntary responses to stimuli.