Nervous System
Of cerebrum, cerebellum, or hypothalamus, this brain region is responsible for reasoning, judgement, and sensory perception
What is cerebrum?
In eukaryotes, this area of the cell holds DNA
What is the nucleus?
The number of daughter cells produced when cells divide through mitosis
What is two?
In the male body, the testes produce sperm and this important hormone that regulates maturation of reproductive structures
What is testosterone?
These chemical messengers of the endocrine system travel in the bloodstream to reach their target tissues
What are hormones?
Of axon, dendrite or cell body, the extension of the neuron that carries the action potential (message) away from the cell body, toward the next cell in the messaging chain
What is axon?
During synthesis of proteins, this organelle serves as a network of membranous channels where proteins go to be modified after leaving ribosomes
What is the endoplasmic reticulum?
The number of daughter cells produced when cells divide through meiosis
What is (up to) four?
In the female body, this important hormone is produced by the ovaries and by adipose (fat) tissue
What is estrogen?
Secreted by the pineal gland in the brain, this substance regulates sleep cycle and wakefulness
What is melatonin?
The sympathetic division of the nervous system is responsible for the fight-or-flight response, and this division is responsible for rest-and-digest
What is parasympathetic?
Glucose from food and oxygen from air go to this organelle for production of ATP
What are mitochondria?
The number of chromosomes in human diploid cells
What is 46?
In the female reproductive system, fertilization normally occurs here
What is the uterine tube (Fallopian tube)?
Secreted by a gland located in the neck, this substance helps regulate metabolism
What is thyroid hormone?
Of sensory, motor or interneurons, the ones that carry messages away from the brain and spinal cord, to a muscle or a gland
What are motor neurons?
If harmful bacteria infect the body, cells use this organelle to destroy them
What are lysosomes?
The number of chromosomes in human haploid cells
What is 23?
Of zygote, embryo or fetus, the developmental stage that results when sperm and egg unite
What is zygote?
Secreted in times of "fight-or-flight", this substance is released from glands located on top of the kidneys
What is adrenaline?
For nerves to signal, the two minerals (in the form of ions) that play crucial roles in generating electrical signals across the cell membranes of neurons are sodium and this
What is potassium?
In this organelle, amino acids are strung together to form proteins
What are ribosomes?
Of mitosis or meiosis, the type of cell division used for repair of body tissues
What is mitosis?
From the word meaning "swift childbirth", this hormone is also responsible for feelings of bonding that can accompany physical touch
What is oxytocin?
Sometimes called the body's master gland, this important structure in the brain releases a number of regulating substances including growth hormone and oxytocin
What is the pituitary gland?