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Development and Agin
MU BSC 105
| Question | Answer |
|---|---|
| How many sperm can penetrate the corona radiata (egg)? | One |
| How long is the pre-embryonic development? | One week |
| How long is embryonic development? | Second week to second month |
| How long is fetal development? | Third month to ninth month |
| When can the gender of a baby first be determined? | Third month |
| When are symptoms of early pregnancy first present for the mother? | Second week |
| When does a baby first open its eyes in the womb? | Seventh month |
| What is the approximate number of weeks until the due date? | Forty weeks |
| What is the first embryonic membrane to appear? | Yolk sac |
| What role does the yolk sac play in humans? | First site of blood cell formation |
| What provides food for the embryo in humans? | Placenta |
| What is usually performed in the fifteenth to seventeenth week of pregnancy to test for possible birth defects? | Amniocentesis |
| What are some ways a mother can help prevent birth defects? | Healthy diet, avoid alcohol and drug abuse, and avoid infections that can cause birth defects |
| Why might it be important for medical personnel to know that you are pregnant? | Several medications that are healthy for adults could be harmful to the fetus, radiation for x-rays could harm fetus, and anesthesia and immunizations are also potentially harmful to the fetus |
| In what week does the heart of a fetus first become developed? | Fifth week |
| What week does the heart become fully developed? | Tenth week |
| About how many beats per minutes does the heart have in the tenth week? | 150 to 195 |
| When does the heart begin to settle into normal levels? | After the twelfth week |
| Can a baby hear in the womb? | Yes |
| When can a baby first hear? | 18 weeks of development |
| When can the baby first recognize its mother's voice? | 25 weeks |
| What does a person with androgen look like? | Looks like female typically, but has undescended testes |
| What happens in the first stage of birth? | Cervix dilates |
| What are Braxton Hicks contractions? | False contractions that occurs through out the pregnancy, last about 20 to 30 seconds and occur every 15 to 20 minutes |
| What happens in the second stage of birth? | Baby emerges |
| What happens in the third stage of birth? | Afterbirth is expelled (placenta) |
| What determines the sex of the baby? | SRY gene |
| When do the sex organs first begin development? | Six weeks |
| When is the development of sex organs complete? | About 14 weeks |
| What are some symptoms a mother might experience when first pregnant? | Nausea, heartburn, vomiting, loss of appetite, constipation, and fatigue |
| Why does a mother gain weight in pregnancy? | Enlargement of breasts and uterine enlargement, weight of the fetus, amniotic fluid, size of placenta, increase in own total body fluid and minerals |
| What can the increased weight of the mother lead to? | Lordosis or lower back pain |
| How much might a pregnant woman's metabolism increase during pregnancy? | 10-15% |
| What are the major changes that take during pregnancy mostly due to? | Estrogen and progesterone |
| What stimulates the uterine muscles to contract? | Oxytocin |
| What happens to the skin (integumentary system) as aging occurs? | Thinner and less elastic, less adipose tissue, and sweat glands become less active (affects temperature tolerances) |
| What happens to the cardiovascular system as a person ages? | Artherosclerosis (possibly), heart muscles weaken, blood vessels lose elasticity and can cause blood to leak back into valves and higher blood pressure |
| What happens to the immune system as a person ages? | Can become compromised, the thymus shrinks, |
| What happens to the digestive system as a person ages? | Metabolism slows (weight gain), saliva production decreases, and bacteria can stick to teeth |
| What happens to the Respiratory system as a person ages? | Decrease in elasticity of lung tissue |
| What happens to the excretory system as a person ages? | Kidneys become smaller and less efficient, possible lack of bladder control |
| What happens to the nervous system as a person ages? | Brain loses 20% of its weight and volume between ages 20 and 90, neurons more sensitive due to lack of blood flow in narrow vessels. Memory loss, strokes, and Alzheimer's |
| What happens to the sensory sytems as a person ages? | Lose sensitivity and more stimulation is needed. More likely to lose smell and taste |
| What happens to the musculoskeletal system? |
Created by:
bmfortn1
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