Unit 1 test Flashcards
(21 cards)
- Inherited traits are passed down from our parents to us, their offspring, by the information that is coded in our parents’
Chromosomes
- Is the most abundant and widely distributed tissue in the entire human body
Connective tissue
- Tissue used for insulation and protection
Connective tissue
- Tissue that lines the body cavity.
Epithelial
- Tissue that allows us to respond to stimuli in our external environment.
Muscle tissue
- Picture ( many rounded cells)
Nervous tissue
- Picture (stringy looking)
Connective tissue
- Explain the structure of the cell membrane. Include two macromolecules that are embedded within it, the polarity of different parts of the membrane, and why this makes membrane selectively permeable.
The cell membrane is a selectively permeable membrane made of of two phospholipid layers. Hydrophobic keeps water molecules out and and hydrophilic allows water molecules in. carbohydrates provide structure to the cell membrane. Proteins assist in transportation of signals and nutrients
- When water moves in or out of a cell
Facilitated diffusion
- Transporting small molecules like O2 and CO2.
Diffusion
- When a white blood cell captures bacteria.
Endocytosis
- Picture (greater to lower concentration)
Diffusion
- Picture (lower to greater)
Facilitated diffusion
- Picture of particles moving into cell
Endocytosis
- Low concentration of water
Hypertonic
- Causes a cell to swell
Hypotonic
- Describe the difference between how negative and positive feedback loops help to maintain homeostasis.
In a negative feedback loop, the output of the system is a stabilizing response, returning the system to a set point. In a positive feedback loop, the output of the system amplifies the response, intensifying what is happening within the system.
- List examples of two types of responses that be triggered by a signaling pathway?
Alteration of enzymes activity
Opening of ion channel
- Is the receptor is #39 an intracellular or membrane receptor? How do you know? (Receptor pictured in membrane)
Membrane receptor because it appears to be embedded in the cell membrane in the picture, not on the other side of the membrane in the cytoplasm like an intracellular receptor.
- Thin tubelike tissue. What type is it? Function? Voluntary or involuntary?
Skeletal, makes up muscles attached to our bones that control our movements. Voluntary
- Thin tubelike tissue. What type is it? Function? Voluntary or involuntary?
Cardiac. Contracts the muscles of the heart to move blood throughout body. Involuntary
