They are capable of renewing and dividing (multiplying) themselves for long periods of time, they are unspecialized, and they can give rise to other specialized cell types. Hope this helps!! :)
Actively growing cells are in interphase. When a growing cell reaches its maximum size, it keeps itself small by entering mitosis and cytokinesis and dividing into 2 smaller daughter cells.
Answer:
1. El corazón se localiza en el mediastino, que es el espacio comprendido entre ambos pulmones. 2. El miocardio es la capa funcional del corazón, puesto que su contracción impulsa la sangre hacia los pulmones y los demás tejidos. 3. Internamente el corazón presenta 4 cavidades: 2 cavidades superiores llamadas auriculasy dos cavidades inferiores conocidas como ventriculos . 4. Entre la aurícula y ventrículo del mismo lado se encuentran las válvulas auriculoventriculares. En el lado derecho tenemos la válvula tricuspide, mientras que en el lado izquierdo se encuentra la válvula mitral . 5. El ciclo cardiaco comprende dos fases, una de contracción o sistole y una de relajación llamada diastole.
Explanation:
El corazon es un organo con un tejido muscular liso especializado donde estas celulas musculares presentan uniones desmosomales de amplia conexion para la diseminacion rapida de señales, es asi como se producen contracciones ritmicas, autonomas y de manera simultanea.
El corazon a su vez presenta su auto irrigacion propia por medio de las arterias coronarias que se encargan de mantener el miocardo en buen estado de vitalidad.
Answer: Regulation of activity by higher brain centers.
Explanation: The autonomic nervous system is part of the peripheral nervous system and is responsible for involuntary actions that occur without control, such as breathing and heart rate.
The somatic nervous system is also part of the peripheral nervous system but is responsible for the transmission of signals to the skeletal muscles and from receptors of external stimuli.
The peripheral nervous system regulates systems such as the nerves and ganglia that are found outside of the brain and spinal cord. Thus the autonomic and somatic nervous systems differ, but both are not involved in the regulation of activity by higher brain centers.
Answer:
Strain Presence of Lactose Absence of Lactose
(+) (-)
For the wild type case, the lacZ gene product will be expressed in the presence of lactose only.
(-) (-)
Because of the super repressor, transcription will not take place regardless of the presence of lactose.
(+) (+)
The constitutive operator will allow for transcription to occur, whether or not lactose is present.
(+) (+)
The repressor is non-functional, transcription will occur with or without presence of lactose.
(+) (+)
The super repressor will not be able to stop transcription as it cannot bind to the constitutive operator.
(-) (-)
The promoter is non-functional, transcription will not start and hence, not gene product formed.
(-) (with glucose present) (-)
E. coli will not metabolize lactose in the present of glucose, since glucose is the preferred source of nutrition.
Hope that answers the question, have a great day!