Question

9 multiple choice 1 point
what are genes?
segments of dna that carry genetic information
small organisms within the body
parts of the brain that control behavior
cells that carry blood

10 multiple choice 1 point
what is the function of neurotransmitters?
they regulate heart rate.
they maintain body temperature.
they produce energy for cells.
they transmit signals across the synaptic cleft.

Explanation:

Define genes and analyze options

Genes are basic units of heredity. They consist of specific sequences of DNA. These sequences carry instructions to make proteins.

• "Segments of DNA that carry genetic information" is correct.
• "Small organisms within the body" is incorrect; genes are molecules, not organisms.
• "Parts of the brain that control behavior" is incorrect; genes are in cells throughout the body.
• "Cells that carry blood" describes red blood cells, not genes.

Define neurotransmitter function and analyze options

Neurotransmitters are chemical messengers. They are released by neurons. They cross the synaptic gap to transmit signals to target cells.

• "They regulate heart rate" is too specific and not their primary general definition.
• "They maintain body temperature" is a homeostatic function regulated by the hypothalamus.
• "They produce energy for cells" is the function of mitochondria.
• "They transmit signals across the synaptic cleft" is the correct general function.

Answer:

Question 9

• Segments of DNA that carry genetic information (Correct answer)
• Small organisms within the body
• Parts of the brain that control behavior
• Cells that carry blood

Question 10

• They regulate heart rate.
• They maintain body temperature.
• They produce energy for cells.
• They transmit signals across the synaptic cleft. (Correct answer)