Biology Chapter 4

ligand-gated ion channel – Type of membrane receptor that has a region that can act as a "gate" when the receptor changes shape.
endocytosis – The process which uses vesicles to transport substances (which are not soluble in the cell membrane) into a cell.
regeneration – repair of lost or damaged body parts
cellular differentiation – the specialization of cells that occurs during embryological development under the control of proteins
A functional group is important because it's where what takes place? – The reaction
What pairs with thymine? – adanine
hormones – Endocrine glands secrete ___________________.
anticodon – a three-nucleotide base sequence on tRNA
Endocytosis – Cellular uptake of biological molecules via formation of new vesicles from the plasma membrane.
Which is NOT a third line of defense:
Plants – multi-cellular eukaryotic autotrophic organisms
electrogenic pump – A transport protein that generates voltage across a membrane, causing a net separation in charge.
spermicide – A sperm-killing chemical (cream, jelly, or foam) that works with a barrier device as a method of contraception.
Neuron: – Neural cell. Made up of dendrites, cell body, axon and axon terminal.
Explain the relationship between genes, chromosomes, and proteins – Genes are sections of DNA that code for traits, the entire strip of genes is called a chromosome, and the code is used to create proteins.
bioenergetics – the study of how organisms manage their energy resources; the overall flow and transformation of energy in an organism; the study of how energy flows through organisms
Which is NOT а third line оf defense:
alternative RNA splicing – Genes giving rise to two or more different polypeptides depending upon which segments are treated as exons.
Menstration – shedding the uterus lining
6.2.4 Outline the control of the heartbeat in terms of myogenic muscle contraction, the role of the pacemaker, nerves, the medulla of the brain and epinephrine (adrenaline) – the heart is myogenic / beats on its own accord;
60-80 times a minute (at rest);
coordination of heartbeat is under the control of pacemaker;
located in the muscle / walls;
sends out signal for contraction of heart muscle;
atria contract followed by ventricular contraction;
fibres / electrical impulses cause chambers to contract;
nerve from brain can cause heart rate to speed up;
nerve from brain can cause heart rate to slow down;
adrenalin/epinephrine (carried by blood) speeds up heart rate;
artificial pacemakers can control the heartbeat;
;Sympathetic nerves speed up heart rate ;Parasympathetic nerves slow down heart rate
diploid – having 2 copies of each chromosome (2n), one from the male parent and one from the female parent.

This entry was posted in Uncategorized. Bookmark the permalink.

Leave a Reply