Biology Quiz on Nervous System and Hormones

Which is correct

• The peripheral nervous system includes the brain and spinal cord.

• The central nervous system controls reflex actions directly.

• The brain is responsible for transmitting electrical impulses to muscles during reflex actions.

• Reflex actions bypass the brain, involving only the spinal cord for quicker responses.

Which is correct

• The retina contains cells that convert light into electrical signals known as ganglion cells.

• Rod cells in the retina are responsible for detecting color in bright light conditions.

• Cone cells in the retina are more sensitive to light than rod cells.

• Rod cells are more abundant than cone cells and are sensitive to low light levels.

Which is correct

• Synapses are the junctions where neurotransmitters are released from axons.

• Synapses are electrical connections between two neurons.

• Synapses directly transmit impulses from one neuron to another without any chemical mediation.

• Synapses are found only in the central nervous system.

Which is correct

• Hormones are transported directly by neurons to their target organs.

• Hormones like adrenaline have immediate effects on the body by activating specific enzymes.

• Hormones are secreted by exocrine glands and have local effects on neighboring cells.

• Hormones can only be transported through the blood.

Which is correct

• The reflex arc involves voluntary actions that require conscious thought.

• The reflex arc pathway is quicker than voluntary actions due to the involvement of the brain.

• The reflex arc involves sensory neurons, relay neurons, and motor neurons for rapid responses.

• The reflex arc operates slower than voluntary actions because it bypasses the brain.

Which is correct

• The iris controls the amount of light entering the eye by altering the curvature of the lens.

• The lens adjusts the size of the pupil to regulate light entering the eye.

• The iris adjusts the size of the pupil to control the amount of light entering the eye.

• The cornea is responsible for adjusting the pupil size in response to light.

Which is correct

• Adrenaline decreases heart rate during stressful situations to conserve energy.

• Adrenaline causes glycogen to be converted into glucose, providing energy during 'fight or flight' responses.

• Adrenaline reduces blood flow to muscles during a stress response.

• Adrenaline increases digestive activity to provide energy in stress situations.

Which is correct

• Homeostasis is the process of maintaining constant internal and external conditions.

• Homeostasis involves the control of only body temperature in humans.

• Homeostasis is maintained primarily by the endocrine system and also by the nervous system.

• Homeostasis requires only the kidneys to maintain water balance in the body.

Which is correct

• The optic nerve transmits sound waves from the ear to the brain.

• The auditory nerve is responsible for transmitting visual information from the eye to the brain.

• The optic nerve transmits electrical signals from the retina to the brain for visual processing.

• The optic nerve plays a role in balancing the body during movement.

Which is correct

• Insulin and glucagon are hormones that decrease blood glucose levels.

• Insulin increases blood glucose levels by converting glucose to glycogen.

• Glucagon increases blood glucose levels by converting glycogen to glucose.

• Insulin has no effect on blood glucose levels during fasting.