Four components of a feedback loop are:

1. Sensor: Detects change, 2. Control center: analyzes info 3. Effector: carries our respnse 4. Feedback; continuous info flow.

Name the three levels of homeostatic control:

Intracellular: regulation within cells (genes/enzymes). Intrinsic: regulation within organs (local chemical signals). Extrinsic: between organs (nervous/endocrine systems)

DNA structure is made up of

A double helix of nucleotides (deoxyribose, phosphate, bases A-T, C-G. Stores heredity info.

RNA structure is made up of

SIngle strand (ribose, phosphate, bases A-U, G-C. Makes proteins and regulates genes.

Protein's four structural levels are

Primary (sequence), secondary (coils/sheets, tertiary (3D folding), and quaternary (multiple chains.

Examples of passive transport where no energy is required are:

Diffusion: movement down a concentration gradient. Simple diffusio: directly through a bilayer Osmosis: water moves across a semipermeable membrane; Facilitated diffusion: transport proteins, channel or carrier mediated

Examples of active transport (requires energy)

Pumps substances against gradients (Na+/K+ pumps, Ca2 pumps) Vesicle trasport moves bulk substaces.

The roles of passive and active transport are:

Passive transport naintains homeostasis by moving molecules down gradients. Active transport concentrates substances, enables secretion and uptake.

catalysts that lower activation energy and regulate metabolism.

The steps of transcription of mRNA are as follows

1. DNA molecue unzips the region of the gene to be transcribed. 2. RNA nucleotides temporarily attach to exposed DNA bases along one strand of unzipped DNA. 3. As nucleotides attach, they bind to each other and form chainlije RNA strand called mRNA.

Mitotic cell division has four phases:

Prophase: "before phase" nuclear envelope falls apart. Metaphase: "position changing phase" chromosomes align in the middle. Anaphase: "apart phase" centromere splits into two chromosomes, pulled to opposite poles. Telophase: "end phase: mature cell

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Physio Weeks 1-6

Physio Weeks 1-6 Midpoint Study Guide

Question	Answer
Four components of a feedback loop are:	1. Sensor: Detects change, 2. Control center: analyzes info 3. Effector: carries our respnse 4. Feedback; continuous info flow.
Name the three levels of homeostatic control:	Intracellular: regulation within cells (genes/enzymes). Intrinsic: regulation within organs (local chemical signals). Extrinsic: between organs (nervous/endocrine systems)
DNA structure is made up of	A double helix of nucleotides (deoxyribose, phosphate, bases A-T, C-G. Stores heredity info.
RNA structure is made up of	SIngle strand (ribose, phosphate, bases A-U, G-C. Makes proteins and regulates genes.
Protein's four structural levels are	Primary (sequence), secondary (coils/sheets, tertiary (3D folding), and quaternary (multiple chains.
Examples of passive transport where no energy is required are:	Diffusion: movement down a concentration gradient. Simple diffusio: directly through a bilayer Osmosis: water moves across a semipermeable membrane; Facilitated diffusion: transport proteins, channel or carrier mediated
Examples of active transport (requires energy)	Pumps substances against gradients (Na+/K+ pumps, Ca2 pumps) Vesicle trasport moves bulk substaces.
The roles of passive and active transport are:	Passive transport naintains homeostasis by moving molecules down gradients. Active transport concentrates substances, enables secretion and uptake.
Enzymes are	catalysts that lower activation energy and regulate metabolism.
The steps of transcription of mRNA are as follows	1. DNA molecue unzips the region of the gene to be transcribed. 2. RNA nucleotides temporarily attach to exposed DNA bases along one strand of unzipped DNA. 3. As nucleotides attach, they bind to each other and form chainlije RNA strand called mRNA.
Mitotic cell division has four phases:	Prophase: "before phase" nuclear envelope falls apart. Metaphase: "position changing phase" chromosomes align in the middle. Anaphase: "apart phase" centromere splits into two chromosomes, pulled to opposite poles. Telophase: "end phase: mature cell

Created by: user-1990799

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