Question

your friend tula, who is pregnant, learns that you are studying biology and tries to quiz you about your knowledge of pregnancy. she tells you that her baby has just starting kicking, and she asks you to guess how far along she is. based on your understanding of life in the womb, you would answer that she is about ______ month(s) pregnant.

○ 7
○ 3
○ 5
○ 1

question 45
1 pts
to respond to an incoming signal, such as your fingertip being burned by a candle’s flame, the signal must be transmitted to the brain before your muscles can be told to respond and pull away.

○ true
○ false

Explanation:

First Question (Pregnancy and Fetal Development)

In human pregnancy, fetal movement (kicking) is typically first felt by the mother around 18 - 20 weeks, which is approximately 5 months (since 1 month of pregnancy is roughly 4 weeks). At 1, 3, or 7 months, the timing of initial kicking doesn't align as well: 1 month is too early (embryonic stage), 3 months (around 12 weeks) is still in the first trimester with limited movement felt, and 7 months is later than the typical onset of noticeable kicking. So the correct answer is 5 months.

In a reflex action like pulling away from a flame, the reflex arc involves the spinal cord, not the brain, for the immediate response. The signal travels from the receptor (fingertip) to the spinal cord (via sensory neuron), then a motor neuron from the spinal cord sends the signal to muscles to respond. The brain is involved in processing the pain later, but the immediate muscle response (pulling away) happens without the signal going to the brain first. So the statement is false.

Answer:

C. 5

Second Question (Reflex Arc and Signal Transmission)