Birth and Neuron Function lecture 11

what is implantation?

Burrows into endometrium a week after ovulation.

what hormone does the embryo secrete during pregnancy

Human Chorionic Gonadotropin (hCG)

what is the Human Chorionic Gonadotropin (hCG)

Promotes corpus luteum to continue making hormones.

it prevents Menstruation

what does the placenta do

Provides nutrients and oxygen and Eliminates waste

During pregnancy placenta source of most progesterone and estrogen.

Need extra calories & vitamins

what is the meaning of pregnancy

Fertilization to birth

what is the gestation period

it is 280 days period from the last menstruation to birth

what is an embryo

Fertilization to week 8

what is a fetus

Week 9 to birth

what is an infant

when the baby is born.

what are the physiological changes during pregnancy

Breasts/uterus enlarge

Pelvis widens • Nausea – hCG, estrogen

Heartburn, Constipation, Frequent urination

Increased Cardiac Output

what is labor

it is within 15 days of due date

what happens during labor

Prostaglandins trigger contractions (Inhibitors prevent labor)

Amnionic sac ruptures

Head emerges

After Birth (placenta is deliver 30 mins after the birth of the baby)

what are the two parts of the nervous systems

Central Nervous System (CNS) (Brain, Spinal Cord)

Peripheral Nervous System (PNS) (Nerves)

The peripheral nervous system is divide into two parts

Somatic (Voluntary) and Autonomic (Involuntary)

The functional unit of the nervous system is called

A neuron

what are the parts of a neuron

Dendrite

Cell body

Axons

Axon terminal

synapse (space between neurons)

what is the basic workflow of the nervous system

1. Peripheral nervous system (sense)

2. Central nervous system (interpret)

3. Peripheral nervous system (responds)